2639247

Information

• Patent Grant
• 2639247

• References
• Source

• Patent Number

  2,639,247

• Date Filed

  Not available

• Date Issued

  Tuesday, May 19, 1953
  72 years ago

• CPC

  • H01B7/102 - responsive to heat
  • G08B17/06 - Electric actuation of the alarm
  • H01C7/04 - having negative temperature coefficient
  • Y10T428/2936 - Wound or wrapped core or coating [i.e., spiral or helical]

• US Classifications

  • 156 - Adhesive bonding and miscellaneous chemical manufacture
  • 174 - Electricity: conductors and insulators
  • 338 - Electrical resistors
  • 428 - Stock material or miscellaneous articles